fix(ci,oas) move oas ci script to a package under the oas workspace (#3391)

* feat(ci,oas) run oas ci on all PRs

* fix(ci,oas) move oas ci script to a package under the oas workspace

* chore(changeset): patch

.github/workflows/oas-test.yml

@@ -1,11 +1,9 @@
 name: OAS Comments Format Validation
 on:
   pull_request:
-    paths:
-      - packages/medusa/oas/**
-      - packages/medusa/src/api/**
-      - packages/medusa/src/models/**
-      - packages/medusa/src/types/**
+    paths-ignore:
+      - "docs/**"
+      - "www/**"
 
 jobs:
   docs-test: